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        <title>$.getUid</title>
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        <article>
            <h3>$.getUid(node)</h3>
            <p>
                <span class="stress">描述：</span>
            </p>
            <p>它要传一个对象或节点作参数，如果它没有uniqueNumber就不它设置一个，将$.uuid加1，赋给它，用于选择器的去重与过滤，以及缓存系统。此方法主要用于框架内部。</p>
            <p>
                <span class="stress">参数：</span>
            </p>
            <dl>
                <dt>target</dt>
                <dd>必需。Element。元素节点。</span>
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            <p>
                <span class="stress">返回值：</span>
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            <p>Number</p>
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